Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a request message to a base station while operating in an idle mode. The base station may generate, in response to the request message, a response message including a random access preamble index corresponding to the received request message. In some cases, the base station may determine a radio network temporary identifier (RNTI) based on the random access preamble index and scramble a cyclic redundancy check (CRC) of the response message with the RNTI. In some examples, the random access preamble index may be included in a payload of the response message. The UE may monitor a physical downlink control channel for the response message to the request message and receive the response message on the physical downlink control channel.
Legal claims defining the scope of protection, as filed with the USPTO.
7. The method of claim 6, wherein the payload is further identified based at least in part on one or more reserved bits of the response message.
8. The method of claim 1, wherein the response message is an acknowledgment of the request message.
9. The method of claim 1, wherein the response message comprises information in response to the request message.
10. The method of claim 9, wherein the request message is a system information request and the information in response to the request message comprises timing or frequency information related to when a requested system information will be transmitted.
11. The method of claim 9, wherein the request message is a positioning reference signal (PRS) request, and the information in response to the request message comprises a configuration for a PRS to be transmitted in response to the PRS request.
12. The method of claim 1, wherein the response message comprises a single random access response.
13. The method of claim 1, wherein a type of the response message is indicated by a type-identifying field in a radio network temporary identifier (RNTI).
21. The method of claim 14, wherein the generated response message is an acknowledgment of the request message.
22. The method of claim 14, wherein the generated response message includes information in response to the request message.
23. The method of claim 22, wherein the request message is a system information request and the information in response to the request message comprises timing or frequency information related to when a requested system information will be transmitted.
24. The method of claim 22, wherein the request message is a positioning reference signal (PRS) request, and the information in response to the request message comprises a configuration for a PRS to be transmitted in response to the PRS request.
26. The method of claim 14, wherein a type of the generated response message is indicated by a type-identifying field in a radio network temporary identifier (RNTI).
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 12, 2021
February 21, 2023
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